JP2007014650A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article, wherein stiffness of wing parts is enhanced, and furthermore fitness of the absorbent main unit can be improved in application. <P>SOLUTION: The absorbent article comprises a vertically long absorbent main unit 11, a pair of wing parts 12 and 12 which respectively extends from the both edges of the main unit 11 in the crosswise direction. The absorbent main unit 11 mainly comprises a face sheet 2, a rear sheet 3 and a absorber 4 positioned between the sheets 2 and 3. The wing part 12 mainly comprises the rear sheet 3 and the face sheet 2 which extend from the absorbent main unit 11 in the crosswise direction, or mainly comprises the rear sheet 3. In the absorbent main unit 11, the absorber 4 and the rear sheet 3 are joined by a main unit joint 7 comprising a plurality of adhesives 71 which are longitudinal and parallel in a stripe pattern. The wing part 12 has an area 12A with stiffness higher than that of the rear sheet 3 and the face sheet 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an absorbent article that is used by being fastened to clothing such as underwear.

  There has been known an absorbent article having a vertically long absorbent main body and a pair of wing portions extending in the width direction from both side edges of the absorbent main body. Such an absorbent article is usually provided with a main body slip stopper and a wing slip stopper on the clothing contact surfaces of the absorbent main body and the wing part. For example, the absorbent main body is made of the main body slip stopper. Fasten to the crotch part of the shorts, and in that state, fold the wing part to the clothing contact surface side (underwear side) of the absorbent main body and secure it to the non-skin contact surface of the crotch part of the shorts with the wing part slip-off prevention material Wear and wear.

Patent Document 1 discloses a sanitary napkin in which a wing portion is provided with a reinforcing layer to increase the rigidity of the wing portion. According to the sanitary napkin described in Patent Document 1, it is possible to prevent the wing portion from being swayed due to the low rigidity of the wing portion.
Moreover, in general absorbent articles, it is desired to improve the fit of the absorbent main body by deforming the absorbent main body into a convex shape toward the wearer's skin side at the time of wearing.

Japanese Utility Model Publication No. 5-65319

  However, Patent Document 1 discloses that a device for increasing the rigidity of the wing portion is disclosed, but further improving the fit of the absorbent main body at the time of wearing by adding a device to the configuration. Nothing is disclosed.

  Therefore, the objective of this invention is providing the absorbent article which can improve the fitting property of the absorptive main body at the time of mounting | wearing by improving the rigidity of a wing part and adding a device to a structure further.

  The present invention is an absorbent article having a vertically long absorbent main body and a pair of wing portions extending in the width direction from both side edge portions of the absorbent main body, the absorbent main body comprising a topsheet, The back sheet and the absorbent body interposed between both sheets are mainly formed, and the wing portion is formed mainly by the back sheet and the top sheet extending in the width direction from the absorbent main body. Or in the absorbent main body, the absorbent body and the back sheet are joined to each other by a plurality of adhesives extending in the longitudinal direction in parallel in a stripe pattern. And the wing portion achieves the object by providing an absorbent article having a region whose rigidity is higher than that of the back sheet and the top sheet. It is.

  According to the absorbent article of the present invention, it is possible to improve the fit of the absorbent main body at the time of wearing by increasing the rigidity of the wing part and further adding a device to the configuration.

Hereinafter, an absorbent article of the present invention will be described based on a preferred embodiment thereof with reference to the drawings. The present invention is an absorbent article that is used by being fastened to clothing such as underwear.
The absorbent article of this embodiment is a sanitary napkin 1 and extends in the width direction from the vertically long absorbent main body 11 and both side edges of the absorbent main body 11 as shown in FIGS. 1 and 2. A pair of wing parts 12 and 12 is provided.

  In addition, the terms “longitudinal direction” and “width direction” mean “longitudinal direction of absorbent article” and “width direction of absorbent article”, respectively. The term “upper surface” means “skin contact surface (side surface)”. The term “lower surface” means “non-skin contact surface (side surface)” or “clothing contact surface”.

The absorbent main body 11 includes a liquid-permeable top sheet 2 that comes into contact with the wearer's skin, and a liquid-impermeable or liquid-permeable back sheet 3 that comes into contact with clothing such as underwear. A liquid-retaining absorbent 4 is interposed between the sheets 2 and 3.
The absorber 4 has a uniform width except for the vicinity of both ends in the longitudinal direction. The top sheet 2 and the back sheet 3 extend outward from the peripheral edge of the absorber 4, and are joined to each other at the extending portion to form a seal portion 13. The seal part 13 is formed by heat sealing.

As the top sheet 2, the back sheet 3, and the absorber 4, materials usually used in the technical field can be used without particular limitation.
As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. As the back sheet 3, for example, a liquid-impermeable or water-repellent sheet such as a thermoplastic resin film or a laminate of the film and a nonwoven fabric can be used, and a water-permeable sheet can also be used. .

As the absorbent body 4, for example, a laminated layer obtained by depositing pulp fibers, or a nonwoven fabric made from pulp fibers can be used.
Although there is no restriction | limiting in the basic weight of the absorber 4, From a viewpoint of reducing the rigidity of the absorber 4 which is a main factor of the rigidity of the absorptive main body 11 whole, it is preferable that it is 300 g / m < ² > or less. Although there is no restriction | limiting in the thickness of the absorber 4, For the same reason, it is preferable that it is 6 mm or less, and it is preferable that it is equal thickness.

In the absorbent main body 11, the absorber 4 and the back sheet 3 are joined by the main body joining portion 7. The main body joint portion 7 includes a plurality of adhesives (hereinafter also referred to as “main body adhesives”) 71, 71.
Although there is no restriction | limiting in the number of the main body adhesives 71, Preferably it is 2-10. In this embodiment, there are five.
Although there is no restriction | limiting in the basic weight of the main body adhesive 71, Preferably it is 40-200 g / m < ² >.
Although there is no restriction | limiting in the width | variety of the main body adhesive agent 71, Preferably it is 1-20 mm.
Although there is no restriction | limiting in the width direction pitch (center-center distance) of the main body adhesive 71, Preferably it is 1-20 mm.

Although there is no restriction | limiting in the ratio (W2 / W1) of the width direction pitch (W2) with respect to the width | variety (W1) in the main body adhesive 71, Preferably it is 1-10.
Although there is no restriction | limiting in the length of the main body adhesive 71, It is longer than the longitudinal direction length of the wing part 12, Preferably it is 70% or more of the longitudinal direction length of the absorber 4, More preferably, it is the absorber 4's length. It is 80 to 90% of the length in the longitudinal direction. The main body adhesive 71 is preferably continuous in the longitudinal direction, but may be partially discontinuous.
Although there is no restriction | limiting in the kind of main body adhesive 71, A hot-melt-adhesive is used preferably.

The wing portion 12 is formed mainly of the back sheet 3 and the top sheet 2 extending in the width direction from the absorbent main body 11.
The wing part 12 has a region 12 </ b> A having higher rigidity than the back sheet 3 and the top sheet 2.
The term “back sheet and top sheet” here means that only the material of the back sheet 3 and the top sheet 2 is virtually extracted and other members, adhesives and the like are excluded. For example, the wing part joining part 8 (described later) that joins the back sheet 3 and the top sheet 2 and the wing part slip stopper 6 (described later) provided on the clothing contact surface are excluded. In the case of the wing portion 12 to which a reinforcing sheet (not shown) is joined (described later), the reinforcing sheet is excluded.

  The rigidity of the region 12 </ b> A with increased rigidity is increased by providing the wing portion joint portion 8 between the back sheet 3 and the top sheet 2 that form the wing portion 12. The wing joint 8 is formed by applying an adhesive in a planar shape. Although there is no restriction | limiting in particular in the method of apply | coating planarly, In order to apply so that an uncoated area | region may not arise, a contact-type application like a coater system is preferable. With non-contact coating such as the slot spray method, it is difficult to apply so that no uncoated area occurs, but even if there is an uncoated area, it is macroscopic. If it is coated in a planar shape, it is assumed that it is coated in a planar shape.

The rigidity of the back sheet 3 and the top sheet 2 forming the wing portion 12 is measured by the following method.
After the wing part 12 is cut into a length of 40 mm / width of 20 mm in the longitudinal direction, the wing part joining part 8 and the wing part slip stopper 6 are removed by using an organic solvent or the like, and the back sheet 3 and the top sheet 2 are separated. . The separated back sheet 3 and the top sheet 2 are superposed, and ultrasonic seals (made by FUJI IMPULSE, part number US-60B, the seal part are two places in the vicinity of both ends in the height direction of the superposed back sheet 3 and top sheet 2 are A cylinder with a diameter of 2 mm and a cylinder with a diameter of 10 mm / height of 20 mm is formed, and a compression test is carried out at a speed of 10 mm / min with a Tensilon compression tester (ORIENTEC, RTC1210A). 22 mm, and the gap value at the end of the test was 10 mm). The maximum load value at this time is obtained, and the 5-point average value is defined as a “bulk softness value”.

Further, the rigidity of the region 12A with increased rigidity is measured by the following method.
After the wing part 12 is cut in the longitudinal direction into a length of 40 mm / a width of 20 mm, only the wing part displacement preventing material 6 is removed. Others are performed in the same manner as the above test method.

The ratio (T2 / T1) of the area (T2) of the region 12A with increased rigidity to the area (T1) of the wing part 12 is not limited, but 80% for obtaining sufficient rigidity of the entire wing part 12 The above is preferable. In the present embodiment, the ratio (T2 / T1) is 90% or more (almost the entire wing portion 12 is a region 12A with increased rigidity).
2, the boundary between the absorbent main body 11 and the wing portion 12 is a straight line connecting the notch of the base 12B on the front side and the notch of the base 12B on the rear side.

As shown in FIG. 2, the wing portion joint portion 8 is provided from the wing portion 12 across the boundary between the absorbent main body 11 and the wing portion 12 and over the absorbent main body 11. When the wing part joint part 8 is provided in such a range, the tolerance with respect to the fracture | rupture from the base 12B of the wing part 12 will improve.
A seal portion 13 is also provided on the peripheral portion of the wing portion 12 continuously from the peripheral portion of the absorbent main body 11.

As shown in FIG. 2 (b), a main body slip stopper 5 for fixing to the garment is provided along the longitudinal direction on the garment contact surface (outer surface) of the back sheet 3 in the absorbent main body 11. It has been. In the present embodiment, the main body displacement stoppers 5 and 5 are provided separately in the width direction on both sides in the width direction on the clothing contact surface of the absorbent main body 11.
Although there is no restriction | limiting in the longitudinal direction length of the main body slip prevention material 5, It is preferable that it is provided over substantially the full length of the absorptive main body 11. FIG.
Although there is no restriction | limiting in the basic weight of the main body slip prevention material 5, Preferably it is 15-50 g / m < ² >.
In the present embodiment, the main body displacement stopper 5 that is continuous in the longitudinal direction is used so that the fit of the absorbent main body 11 can be further improved. From the viewpoint of force balance, the main body displacement stopper 5 may be formed in a stripe shape that is discontinuous in the longitudinal direction.

  A wing portion misalignment stopper 6 is provided on the clothing contact surface of the wing portion 12. As shown in FIG. 3A, the wing portion 12 has a clothing contact surface side of the absorbent main body 11 in a state where the clothing contact surface of the absorbent main body 11 is fixed to the clothing S by the main body displacement stopper 5. It is folded back (clothing side) and fastened to the garment S by the wing part misalignment stopper 6 to improve the fastening force of the sanitary napkin 1 as a whole against the garment S.

  There are no particular restrictions on the method of coating the main body misalignment stopper 5 and the wing part misalignment stopper 6. Either a contact-type coating method or a non-contact-type coating method may be used. An example of the contact-type coating method is a coater method. Examples of the non-contact coating method include a slot spray method.

  The region 12A with increased rigidity and the wing portion misalignment stopper 6 are arranged so as to overlap in plan view. As shown in FIG. 2, “arranged so as to overlap in a plan view” means that when the wing portion 12 is seen in a plan view, the region 12 </ b> A with increased rigidity and the wing portion slip stopper 6 are all or It means that some overlap. It is preferable that the entire wing portion misalignment stopper 6 overlaps the region 12A with increased rigidity.

  Further, in a state in which the wing portion 12 is folded back to the clothing contact surface side of the absorbent main body 11, the region 12 </ b> A with increased rigidity and the main body displacement stopper 5 are disposed so as to overlap in plan view. As shown in FIG. 3A, “arranged so as to overlap in plan view” means that the region 12 </ b> A with increased rigidity and the main body displacement stopper 5 are located when the wing portion 12 is viewed in plan. It means that all or some overlap.

  The sanitary napkin 1 of the present embodiment configured as described above, for example, as shown in FIG. 3A, the clothing contact surface of the absorbent main body 11 is attached to the crotch portion of the shorts S by the main body displacement stopper 5. Further, in this state, the wing portion 12 is folded back to the clothing contact surface side (clothing side) of the absorbent main body 11 and is fastened to the crotch portion of the shorts S by the wing portion misalignment stopper 6. Can do.

  According to the sanitary napkin 1 of the present embodiment, since the wing portion 12 has the region 12A whose rigidity is higher than that of the back sheet 3 and the top sheet 2, the rigidity of the wing portion 12 is high. The tear resistance of the wing part 12 is improved. Therefore, after use, when the wing part 12 is peeled from the crotch part of the shorts S, the wing part 12, particularly the back sheet 3 forming the wing part 12, is not easily broken. Moreover, since the rigidity of the wing part 12 is high, the wing part 12 is hardly swung and its operability is also high.

Further, in the absorbent main body 11, the absorbent body 4 and the back sheet 3 are joined by a main body joint portion 7 in which a plurality of main body adhesives 71 extending in the longitudinal direction are juxtaposed in stripes. Since the back sheet 3 is not bonded to the entire surface, the absorbent main body 11 is excellent in flexibility. In particular, when an external force is applied to the absorbent main body 11 from the outside in the width direction, the absorbent main body 11 is easily bent in the width direction.
Moreover, since there is a gap between the main body adhesives 71, 71, the absorbent main body 11 can be deformed compared to a configuration in which the absorbent body 4 and the back sheet 3 are entirely bonded by the adhesive. The degree of freedom is high and the fit of the absorbent main body 11 is good.

  And the rigidity of the wing part 12 in the width direction is increased by providing the region 12A with increased rigidity in the wing part 12, and the absorbent body 4 and the back sheet 3 are bonded to the plurality of main body adhesives in the absorbent main body 11. The rigidity of the width direction of the absorptive main body 11 becomes relatively low by joining by the main body joint part 7 in which 71 is arranged in parallel in a stripe pattern. As a result, the rigidity in the width direction of the absorbent main body 11 is lower than the rigidity in the width direction of the wing portion 12 (including the rigidity of the shorts S). 11 fit nature further improves.

  3A, when an external force is applied to the sanitary napkin 1 from the outside in the width direction, the sanitary napkin 1 is moved from the high-rigidity wing portion 12 to the low-rigidity absorbent main body 11. Curvature directionality in the direction toward it occurs. Therefore, the sanitary napkin 1 is formed from the wing portion 12 to the absorbent main body 11 together with the crotch portion of the shorts S sandwiched between the absorbent main body 11 and the wing portion 12 as shown in FIG. Curves convexly toward. As a result, since the absorptive main body 11 approaches the wearer's skin in a curved state, the fit is improved.

  Since the main body misalignment stopper 5 is provided on the absorbent main body 11 and the wing portion misalignment stopper 6 is provided on the wing portion 12, when the sanitary napkin 1 is mounted on the shorts S in the mounting state shown in FIG. The back sheet 3 and the shorts S in the wing portion 12 and the absorbent main body 11 are integrated. Therefore, the rigidity of the shorts S is added to the rigidity of the wing portion 12, the difference in rigidity with the absorbent main body 11 is further increased, and the curving directionality of the absorbent main body 11 is further increased.

  If the back sheet 3 has water vapor permeability, the entire wing portion 12 has water vapor permeability. Therefore, there is an advantage that the stuffing of the region of the shorts S to which the wing portion 12 is fixed can be reduced. The back sheet 3 having transparency has a drawback that the tear strength is generally weak and the wing portion 12 is easily torn. Thus, since the wing portion 12 is provided with the region 12A having increased rigidity, the back sheet 3 having low tear strength is reinforced, and sufficient tear strength is ensured.

  Further, the absorbent body 4 and the back sheet 3 in the absorbent main body 11 are joined by a main body joint portion 7 in which a plurality of main body adhesives 71 are arranged in parallel in a striped manner. Since there is a gap between them, the water vapor permeability between the absorbent body 4 and the clothing contact surface (outer surface) of the back sheet 3 is not hindered.

As mentioned above, although the absorbent article of this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention is changeable suitably without being restrict | limited to the said embodiment.
The clothes to which the absorbent article of the present invention is attached are not limited to underwear for the lower body such as shorts, and may be underwear for the upper body such as other disposable diapers and shirts.
The present invention is not limited to sanitary napkins, and can be applied to, for example, panty liners, incontinence liners, and incontinence pads. In addition, it can be applied to a urine pad used by being fixed inside a disposable diaper or a breast milk pad used by being fixed to a shirt or the like.

  The rigidity of the region where the rigidity is increased may be increased by bonding and providing a reinforcing sheet (not shown) different from the back sheet and the top sheet in the wing portion. In that case, the wing portion may be formed mainly with a back sheet extending in the width direction from the absorbent main body (that is, without using a top sheet). In addition, when the wing part is formed mainly of the back sheet and the top sheet and the reinforcing sheet is joined and reinforced, the wing part joint part is provided between the back sheet and the top sheet. It may not be provided.

  The absorbent article of the present invention may further include various members according to the specific application. For example, when applied to a sanitary napkin or an incontinence pad, a pair of three-dimensional guards can be provided on the left and right sides of the absorbent article.

FIG. 1 is a plan view showing a sanitary napkin as an embodiment of the absorbent article of the present invention. 2A is a bottom view showing a state where the back sheet is virtually removed from the sanitary napkin shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB shown in FIG. 3 (a) is a cross-sectional view (corresponding to FIG. 2 (b)) showing a state where the sanitary napkin shown in FIG. 1 is attached to clothing, and FIG. 3 (b) is shown in FIG. 3 (a). FIG. 3 is a cross-sectional view (corresponding to FIG. 2B) showing a state when an external force is applied to the sanitary napkin in the state from the outside in the width direction.

Explanation of symbols

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 11 Absorbent main body 12 Wing part 12A The area | region where rigidity was heightened 13 Seal part 2 Top sheet 3 Back sheet 4 Absorber 5 Main body slip stopper 6 Wing slip stopper 7 Main body joint 71 Adhesive 8 Wing part joint S Shorts (clothing)

Claims (4)

An absorbent article having a vertically long absorbent main body and a pair of wing parts extending in the width direction from both side edges of the absorbent main body,
The absorptive main body is mainly formed of a top sheet, a back sheet and an absorbent body interposed between both sheets,
The wing portion is formed mainly with the back sheet and the top sheet extending in the width direction from the absorbent main body, or is formed with the back sheet as a main body,
In the absorptive main body, the absorber and the back sheet are joined by a main body joining portion in which a plurality of adhesives extending in the longitudinal direction are arranged in parallel in a stripe shape,
The said wing part is an absorbent article which has the area | region where rigidity was raised rather than the said back surface sheet and the said surface sheet.   The rigidity of the region where the rigidity is increased is increased by providing a wing portion joint portion in which an adhesive is coated in a planar shape between the back sheet and the top sheet forming the wing portion. The absorbent article according to claim 1, wherein the absorbent article is enhanced by bonding a reinforcing sheet different from the back sheet and the top sheet to the wing portion.   The wing portion slip stopper is provided on a clothing contact surface of the wing portion, and the region having the increased rigidity and the wing portion slip stopper are disposed so as to overlap in a plan view. The absorbent article according to 1 or 2. The clothing contact surface of the absorbent main body is provided with a main body slip stopper,
The state in which the rigidity is increased and the main body misalignment stopper are arranged so as to overlap in a plan view in a state where the wing portion is folded back on the clothing contact surface side of the absorbent main body. 4. The absorbent article according to any one of 3.

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